JPH068221A - Surface finishing of concrete product - Google Patents

Abstract

PURPOSE:To finish simply the surface of a concrete product into a fixed pattern having smooth or uneven state, in a molding method of a concrete shuttering which is demolded before solidification of concrete. CONSTITUTION:A mold release film 30 is fitted releasably beforehand to the inside 16a turning molding surface of an outer mold 16. At the same time, a mold release board material 32 to which uneven process is performed is fitted releasably beforehand to the outside 14a turning molding surface of an inner mold 14. A vibration is given to the outer mold 16 and concrete is placed within a spatial part 20 under this state. Since the placed concrete has quick-drying properties and forced filling is performed by the vibration, a predetermined form is held immediately and after completion of placement of the concrete, demolding of a PC concrete shuttering is formed prior to solidification of the concrete. At the time of demolding of the PC concrete shuttering, the PC concrete shuttering turns state wherein the mold release film 30 and mold release plate material 32 are stuck to the PC concrete shuttering. After solidification of the concrete, the mold release film 30 and mold release plate material 32 are peeled off.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for finishing a surface of a concrete product, and more particularly to demolding a molded product from the formwork before the concrete is hardened in order to accelerate the diversion cycle of the formwork of the concrete product. Method for finishing finished concrete products.

[0002]

2. Description of the Related Art Concrete products molded by using a formwork have columns or beams made of reinforced concrete, and in recent years, due to a shortage of workers, these concrete products tend to be used for construction.

By the way, since many of the concrete products are manufactured with a uniform shape, after the concrete is placed and molded using a predetermined mold, the molds are diverted one after another to mass produce the concrete products. . The instant demolding method is known as a mass production method at this time. In this immediate demolding method, concrete of slump 0 is used to place a concrete product while vibrating it, and immediately after the concrete is placed, the concrete product is demolded from the formwork in a state where the concrete is not cured. It is like this. Further, when the concrete product is demolded, the concrete product is pulled out in a direction parallel to the molding surface of the mold, thereby eliminating the need for disassembling the mold and further improving the conversion efficiency of the mold. it can.

[0004]

However, in the conventional method for molding a concrete product using the instant demolding method, the conversion efficiency of the mold is significantly improved, and the mass production can be made efficient. However, before the concrete hardens, it is removed from the mold in the direction parallel to the molding surface, so the surface of the concrete product cannot be finished smooth,
I have no choice but to rely on human labor for the finishing. Further, even when an uneven pattern or the like is formed on the surface of the concrete product, there is a problem that the immediate demolding method becomes extremely difficult.

In view of such conventional problems, the present invention provides a form forming method in which the concrete is demolded before hardening, and the surface of the concrete product is easily finished into a predetermined pattern of smooth or uneven shape. It is an object of the present invention to provide a surface finishing method for a concrete product that can be used.

[0006]

In order to achieve the above object, the first method of the present invention is such that a smooth release film is preliminarily attached to the molding surface of a mold in a detachable manner. Concrete is placed in the attached mold, then, before the placed concrete hardens, the concrete molded product is demolded with the release film attached, and after this concrete hardens Peel the film from the concrete molding.

Further, in order to achieve the above object, the second method of the present invention is such that a mold release plate material having an uneven surface is detachably attached to the molding surface of the mold, and this mold release plate material is attached. Concrete is placed in the mold, and then the concrete molded product is demolded in a state where the above-mentioned release plate material is stuck before the cast concrete is hardened, and after this concrete is hardened the release plate material Is separated from the concrete molded product.

[0008]

According to the first method of finishing the surface of a concrete product of the present invention, since the concrete product is covered by the smooth release film preliminarily attached to the molding surface of the mold, the concrete product is hardened. The mold release before is easily performed, and the mold release film is peeled off when the concrete is hardened after the mold release, so that the surface of the concrete product can be made smooth by the mold release film surface.

According to the second method of finishing the surface of a concrete product of the present invention, a release plate material having an uneven surface is preliminarily attached to the molding surface of the mold. The plate material can provide a predetermined uneven surface on the surface of the concrete product.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 to 3 show one embodiment of a surface finishing method for a concrete product according to the present invention, FIG. 1 is a schematic configuration diagram showing one embodiment of a formwork apparatus used in the method of the present invention, and FIG. FIG. 3 is a perspective view showing an example of a concrete product manufactured by the manufacturing method of the present invention. In this embodiment, a PC form used for constructing a reinforced concrete column as a concrete product will be described as an example.

That is, the PC mold 12 for a pillar as a concrete product shown in FIG. 3 is manufactured by the mold device 10 shown in FIG.
2 is formed as a hollow column having a rectangular cross section.

As shown in FIG. 2, the mold apparatus 10 includes an inner mold 14 having an outer shape formed along the inner shape of the PC mold 12, and an inner mold formed along the outer shape of the PC mold 12. The outer mold 16 formed, and these inner mold 14 and outer mold 16
And are arranged concentrically with a space corresponding to the wall thickness of the PC form 12 being kept around. The inner mold 14 and the outer mold 16 are the base 1
8 is mounted on the base 8, and the base 18 closes the lower end of the space 20 between the inner mold 14 and the outer mold 16.

Above the inner mold 14 and the outer mold 16, a hopper 22 for pouring concrete into the space 20 is provided.
Is provided, and a certain amount of concrete is poured into the space 20 from the fresh concrete stored in the hopper 22. The concrete poured at this time is a quick-hardening slump 0.

The outer mold 16 is provided with a vibrator 24, and vibration generated by the operation of the vibrator 24 is added to the outer mold 16 to impart fluidity to the cast concrete. Fill it compactly.

Here, in this embodiment, when the PC mold 12 is molded by using the mold device 10, before the concrete is poured, the outer mold 1 as shown in FIG.
6, the release film 30 is detachably attached to the inner surface 16a serving as the molding surface of 6, and the release plate member 32 having the unevenness is detachable from the outer surface 14a serving as the molding surface of the inner mold 14 in advance. Install it.

The release film 30 is made of synthetic resin in the form of a thin film and has a smooth surface. Further, the release plate material 32 is formed by forming a foamed cushioning material such as styrofoam into a thin plate shape, and the surface thereof is an uneven surface due to innumerable foamed parts.

When the PC mold 12 is manufactured by the mold device 10, first, the vibration exciter 24 is operated to apply vibration to the outer mold 16, and in this state, the concrete is discharged from the hopper 22 into a space portion. Place in 20. Then, the concrete poured into the space 20 is filled between the inner mold 14 and the outer mold 16 while being compacted by the vibration of the outer mold 16.

By the way, the fact that the concrete is fast-hardening and that it is compacted and filled by vibration are immediately solidified to the extent that a predetermined shape is maintained.
Then, immediately after the pouring of the concrete is completed, the outer mold 16 and the inner mold 14 are raised, and the PC mold 12 is demolded. Therefore, this demolding is performed in a state where the concrete is not hardened. The PC mold 12 may be demolded by lowering the base 18, and the mold is demolded in parallel along the molding surfaces of the outer mold 16 and the inner mold 14.

When the PC mold 12 before hardening the concrete is removed from the mold, the release film 30 and the release plate material 32 are attached to the outer surface and the inner surface of the PC mold 12, respectively. . Then, the PC mold 1 with the release film 30 and the release plate material 32 attached to each other in this manner
2 is cured, and after the concrete is hardened as shown in FIG. 3, these release film 30 and release plate material 32
It is designed to be peeled off. As mentioned above, PC
When the mold 12 is demolded, the PC mold 12 before curing is covered with the release film 30 and the release plate material 32.
Its shape can be prevented.

Therefore, by peeling off the release film 30 and the release plate material 32, the outer surface of the PC mold 12 can be finished to be a smooth surface along the surface of the release film 30 and the PC mold can be used. The inner side surface of the frame 12 may be provided with a pattern along the uneven surface of the release plate material 32. Therefore, when a reinforced concrete column is constructed by using the PC form 12, finishing of the outer side surface thereof can be omitted, and the inner side surface of the PC form 12 becomes uneven,
It is possible to improve the binding property with the concrete placed on the inner surface.

As described above, in the present embodiment, the conversion efficiency of the inner mold 14 and the outer mold 16 is remarkably improved by the instant demolding method (for example, 20 PC molds 12 can be manufactured per day). .), The outer surface of the molded PC form 12 can be finished smooth, and the commercial value thereof can be greatly improved.

In this embodiment, the inner surface 16a of the outer mold 16 is
, A release plate material can be attached in place of the release film 30, and by attaching a pattern such as tiles or bricks to the release plate material, the decorative property of the outer surface of the PC form 12 can be improved. Can be further improved.

In this embodiment, the case where the PC formwork 12 for a pillar is molded as a concrete product is shown as an example, but the present invention is not limited to this, and a PC formwork for a beam or other concrete products can be used. Needless to say, the surface finishing method of the present invention can be applied. Further, it goes without saying that the surface finishing method of the present invention is not limited to the instant demolding method shown in the present embodiment, and can be applied to a normal molding method using quick-hardening concrete.

[0024]

As described above, in the surface finishing method for concrete products according to claim 1 of the present invention, a release film is detachably attached to the molding surface of the mold in advance, and the mold release is performed. With the film attached, the concrete product is released from the mold before the concrete is hardened, and the release film is peeled off from the concrete product after the concrete is hardened. The surface of the concrete product can be made smooth by the release film surface. Therefore, while significantly increasing the conversion efficiency of the form,
Since the surface finish can be easily performed, products with high commercial value can be supplied at low cost.

Further, in the surface finishing method for a concrete product according to claim 2 of the present invention, a mold release plate material having an uneven surface is preliminarily attached to the molding surface of the mold and the concrete product is manufactured by the mold release plate material. Since a predetermined uneven surface can be provided on the surface, various excellent effects that the commercial value can be further enhanced are exhibited.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a formwork apparatus used in a surface finishing method of the present invention.

FIG. 2 is an enlarged sectional view taken along the line AA in FIG.

FIG. 3 is a column PC using the surface finishing method of the present invention.
It is a perspective view which shows one Example of a formwork.

[Explanation of symbols]

10 Formwork Device 12 PC Formwork for Column (Concrete Product) 14 Inner Mold 16 Outer Mold 24 Vibration Machine 30 Release Film 32 Release Plate Material

Claims (2)

[Claims] 1. A smooth release film is detachably attached to a molding surface of a formwork in advance, concrete is placed in the formwork to which the release film is attached, and then the placed concrete hardens. Before the release, the concrete molded product is demolded in a state where the mold release film is attached, and after the concrete is hardened, the mold release film is peeled off from the concrete molded product. 2. A mold-releasing release plate material is detachably attached to the molding surface of the formwork, concrete is placed in the formwork to which the release plate material is attached, and then placed. The surface of the concrete product, characterized in that before the concrete hardens, the concrete molded product is demolded in a state where the release plate material is stuck, and the mold release plate material is peeled from the concrete molded product after the concrete hardens. Finishing method.